Transducer suspension system including a frequency dependent shunt

Abstract

A transducer suspension system comprises an actuator arm and a suspension. The suspension is comprised of a load beam and a laminated member. The laminated member has an electrically conducting layer and electrical insulating layer, and an electrically conductive support layer. The electrical conducting layer is formed into electrical lines. The support layer is formed into a continuous underlying conductive plane. The conductive plane is connected to the arm by means of a frequency dependent shunt. The combination of the conductive plane and the shunt provide for higher frequency performance with reduced interference susceptibility.

We claim:  
     
       1. A transducer suspension system comprising: 
       an electrically conducting actuator arm;  
       a suspension comprising a load beam and a laminated member, the laminated member comprising an electrically conducting layer, an electrically insulating layer, and a electrically conducting support layer, the electrical conducting layer comprising electrical leads running from a distal end of the suspension to the arm, the support layer forming a continuous conductive plane beneath the electrical leads; and  
       a frequency dependent shunt located between the conductive plane and the arm.  
     
     
       2. The system of claim  1 , wherein the shunt is capacitive. 
     
     
       3. The system of claim  1 , wherein the shunt is an electrical connection. 
     
     
       4. The system of claim  1 , wherein the shunt comprises an adhesive area located between the ground plane and the arm. 
     
     
       5. A transducer suspension system comprising: 
       an electrically conducting actuator arm;  
       a suspension comprising a load beam and a laminated member, the laminated member comprising an electrically conducting layer, an electrically insulating layer, and a electrically conducting support layer, the electrical conducting layer comprising electrical leads running from a distal end of the suspension to the arm, the support layer forming a continuous conductive plane beneath the electrical leads;  
       a frequency dependent shunt located between the conductive plane and the arm;  
       a transducer element attached to the suspension;  
       a recording media located proximate to the transducer element;  
       a media movement device for moving the media;  
       an arm movement device for moving the arm; and  
       an electrical device connected to the transducer element for reading data from the media.  
     
     
       6. The system of claim  5 , wherein the shunt is capacitive. 
     
     
       7. The system of claim  5 , wherein the shunt is an electrical connection. 
     
     
       8. The system of claim  5 , wherein the shunt comprises an adhesive area located between the ground plane and the arm.